<?php
/**
 * 获取已上传的文件列表
 * User: Jinqn
 * Date: 14-04-09
 * Time: 上午10:17
 */
include "Uploader.class.php";

/* 判断类型 */
switch ( $_GET[ 'action' ] ) {
    /* 列出文件 */
    case 'listfile':
        $allowFiles = $CONFIG[ 'fileManagerAllowFiles' ];
        $listSize   = $CONFIG[ 'fileManagerListSize' ];
        $path       = $CONFIG[ 'fileManagerListPath' ];
        break;
    /* 列出图片 */
    case 'listimage':
    default:
        $allowFiles = $CONFIG[ 'imageManagerAllowFiles' ];
        $listSize   = $CONFIG[ 'imageManagerListSize' ];
        $path       = $CONFIG[ 'imageManagerListPath' ];
}
$allowFiles = substr(str_replace(".", "|", join("", $allowFiles)), 1);

/* 获取参数 */
$size  = isset($_GET[ 'size' ]) ? htmlspecialchars($_GET[ 'size' ]) : $listSize;
$start = isset($_GET[ 'start' ]) ? htmlspecialchars($_GET[ 'start' ]) : 0;
$end   = $start + $size;

/* 获取文件列表 */
$path  = $_SERVER[ 'DOCUMENT_ROOT' ] . ( substr($path, 0, 1) == "/" ? "" : "/" ) . $path;
$url   = $_SERVER[ 'HTTP_HOST' ];
$files = getfiles($path, $allowFiles, 'http://' . $url);
if ( ! count($files) ) {
    return json_encode([
        "state" => "no match file",
        "list"  => [],
        "start" => $start,
        "total" => count($files),
    ]);
}

/* 获取指定范围的列表 */
$len = count($files);
for ( $i = min($end, $len) - 1, $list = []; $i < $len && $i >= 0 && $i >= $start; $i-- ) {
    $list[] = $files[ $i ];
}
//倒序
//for ($i = $end, $list = array(); $i < $len && $i < $end; $i++){
//    $list[] = $files[$i];
//}

/* 返回数据 */
$result = json_encode([
    "state" => "SUCCESS",
    "list"  => $list,
    "start" => $start,
    "total" => count($files),
]);

return $result;


/**
 * 遍历获取目录下的指定类型的文件
 *
 * @param       $path
 * @param array $files
 *
 * @return array
 */
function getfiles( $path, $allowFiles, $url = NULL, &$files = [] )
{
    if ( ! is_dir($path) ) return NULL;
    if ( substr($path, strlen($path) - 1) != '/' ) $path .= '/';
    $handle = opendir($path);
    while ( FALSE !== ( $file = readdir($handle) ) ) {
        if ( $file != '.' && $file != '..' ) {
            $path2 = $path . $file;
            if ( is_dir($path2) ) {
                getfiles($path2, $allowFiles, $url, $files);
            }
            else {
                if ( preg_match("/\.(" . $allowFiles . ")$/i", $file) ) {
                    $files[] = [
                        'url'   => $url . substr($path2, strlen($_SERVER[ 'DOCUMENT_ROOT' ])),
                        'mtime' => filemtime($path2),
                    ];
                }
            }
        }
    }
    return $files;
}
